Sand-valve mechanism.



Nb. 78,910. Patented Nov. l8, i902.

M. P. MCLAUGHLIN.

SAND VALVE MECHANISM.

(Application filed. Aug. 26. 1902.)

(No nuclei.)

WITNESSES:

'rrrrlns AllET FFICE- MILTON P. MCLAUGHLIN, OF WAKEFIELD, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO 0. W. BROXVN, OF \VAKEFIELD, MASSACHUSETTS.

SAND-VALVE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 713,910, dated November 18, 1902.

Application filed August 26, 1902- Serial No. 121,056; (N model-J T0 aZZ whom it may concern: tion is a cylinder f, the drawings represent- Beitknown that LMILTONFMCLAUGHLIN, ing said cylinder as having a screw-threaded of WVakefield, in the county of MiddleseX and boss or lower end fitted to a central screw- State of Massachusetts, haveinvented certain threaded opening in the web or partition.

new and useful Improvements in Sand-Valve The walls of cylinder-f are provided with Mechanism, of which the following is a speciports g, connecting the upper end of the cylfication. inder with the space below the web or parti- This invention relates to means for controltion d. Fitted to said cylinder is a piston h, ling the supply of sand to railroad-tracks and having a rod 2' extending out through its lower I0 is designed for use in connection with steam, end, said rod having secured thereto a cross electric, and other motor cars or vehicles. head or arm 7;, each end of which is provided The object of the invention is to provide a with a valve Z, adapted to close the ports 6. structure of valve and the controlling mech- Aspring m is interposed between the piston anism thereforwhereby the pressureiof fluid, and the lower end of the cylinder and is :5 such as steam or air, may be employed to first adapted to normally hold said piston at the open the sand-valve and instantly supply a upper end of the cylinder, as represented in current of fluid, whereby sand will be carried Fig. 2. through the usual sand-pipes to the tracks. From the above description, in connection A further object of the invention is to pro with the drawings, it will be obvious that 20 vide a device of this character in which the upon the admission of fluid under pressure, sand valve or valves will be automatically such as steam or air, to the upper end of the moved out of the path of the sand. cylinder the piston will he forced downward To these ends the invention consists in from the position shown in Fig. 2 to the pothe construction and arrangement of parts sition shown in Fig. 3, thus opening the 25 substantially as hereinafter described and valves and immediately thereafter opening claimed. the ports g.

Of the accompanying drawings, Figure 1 In Fig. 1, (1 represents the main supplyrepresents an elevation of an ordinarytype pipe for steam or compressed air. From said of sand-box, the top of a locomotive-boiler pipe (1 branch pipes t lead, one to the upper 30 being indicated in section, the pipes from the end of each cylinder f. As the supply of sand-box having my improved attachment fluid through the pipe (I is under the control connected therewith. Fig. 2 represents an of the engineer, the simple operation of openenlarged section through one of the casings ing the valve for supplying steam or air to and the attachment shown in Fig. 1. Fig. 8 said pipe q will immediately open the sand- 35 represents a section similar to Fig. 2, but valves and then permitthe supply of fluid to with the internal partsinadifferent position. carry the sand through the pipes 11 to the Fig. 4: represents an under plan view of Fig. 2. rails.

Fig. 5 represents a section on line 5 5 of Fig. 2. To insure a lateral movement of the valves The same reference characters indicate the while opening, so that they will pass out of c same parts in all the figures. alinement with the sand-ports e, I preferably A common type of sand-box is represented form an inclined groove '17. in the piston h and at a, while sand-pipes 1), leading therefrom, locate a dowel or guide pin 0 in the cylinder are or maybe of the usual type. Each sandf, so that its inner end will extend into said pipe adjacent to the sand-box has interposed groove n. This construction is clearly illus- 45 therein, as a section of the length of said trated in Figs. 2, 3, and 5 and will readily 5 pipe, a casing a, formed with an internal demonstrate that the downward movement of cross web or partition d. The said web or the pistonin the cylindercausesaspiral movepartition (Z is provided with one or more sandment of the valves Z, so that while opening ports 6, preferably two, as indicated in the they move laterally to the position shown by i 50 drawings. Mounted upon said web or partidotted lines in Fig. 5. By this construction 10o laterally it moi! aids 02 in n .H m m w, W h

the :1 per and a! tin Q11 cylgndsr avalvesndaptnd a spring between and of the cylinder 

